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> > > > + perst-gpios = <&tlmm 94 GPIO_ACTIVE_LOW>; > > > > + > > > > + pinctrl-0 = <&pcie0_default_state>; > > > > + pinctrl-names = "default"; > > > > + > > > > + iommu-map = <0x0 &apps_smmu 0x1400 0x1>, > > > > + <0x100 &apps_smmu 0x1401 0x1>, > > > > + <0x208 &apps_smmu 0x1402 0x1>, > > > > + <0x210 &apps_smmu 0x1403 0x1>, > > > > + <0x218 &apps_smmu 0x1404 0x1>, > > > > + <0x300 &apps_smmu 0x1407 0x1>, > > > > + <0x400 &apps_smmu 0x1408 0x1>, > > > > + <0x500 &apps_smmu 0x140c 0x1>, > > > > + <0x501 &apps_smmu 0x140e 0x1>; > > > > + > > > > + /delete-property/ msi-map; > > > > > > Why? > > I tried extending the msi-map to cover the RIDs from the QPS615 > > PCIe switch (matching the iommu-map entries), but this caused > > ITS MAPD command timeouts. > > I'm not aware of any specific issue with ITS on this chipset. At what time did > you see the timeout? During probe? So when I set msi-map to match the iommu-map entries, I got this; [ 0.000000] ITS [mem 0x17140000-0x1717ffff] [ 11.085152] ath12k_wifi7_pci 0001:04:00.0: BAR 0 assigned [ 11.115762] ath12k_wifi7_pci 0001:04:00.0: Wi-Fi 7 Hardware name: wcn7850 hw2.0 [ 11.153632] ath12k_wifi7_pci 0001:04:00.0: MSI vectors: 16 [ 11.252398] mhi mhi0: Requested to power ON ......... [ 101.596274] mhi mhi0: Wait for device to enter SBL or Mission mode [ 101.603098] ath12k_wifi7_pci 0001:04:00.0: failed to set mhi state: POWER_ON(2) [ 101.610632] ath12k_wifi7_pci 0001:04:00.0: failed to start mhi: -110 [ 101.617171] ath12k_wifi7_pci 0001:04:00.0: failed to power up :-110 [ 101.794431] ath12k_wifi7_pci 0001:04:00.0: probe failed with error -110 [ 103.158872] ITS queue timeout (12640 12609) [ 103.163183] ITS cmd its_build_mapd_cmd failed With msi-map removed, I got this; [ 11.469642] ath12k_wifi7_pci 0001:04:00.0: BAR 0 assigned [ 11.490059] ath12k_wifi7_pci 0001:04:00.0: Wi-Fi 7 Hardware name: wcn7850 hw2.0 [ 11.497787] ath12k_wifi7_pci 0001:04:00.0: MSI vectors: 16 [ 11.559958] mhi mhi0: Requested to power ON [ 11.567375] mhi mhi0: Power on setup success [ 11.693069] mhi mhi0: Wait for device to enter SBL or Mission mode [ 12.185946] ath12k_wifi7_pci 0001:04:00.0: chip_id 0x2 ... soc_id 0x40170200 [ 12.482168] ath12k_wifi7_pci 0001:04:00.0 wlP1p4s0: renamed from wlan0 > > > From what I could gather, deleting > > msi-map forces the PCIe controller to fall back to the internal > > iMSI-RX module, where this worked properly. > > > > That's true. > > > For reference, I checked the RB3gen2 since it also uses a QPS615 > > and there doesn't seem to be any msi-map defined (in kodiak.dtsi). > > > > But Kodiak has no MSI support (no LPIs). That's why the ITS node is disabled and > iommu-map is used. Good to know, thanks Mani. > > > Any recommendations to resolve this properly? > > I will also check internally in the meantime. Thanks Mani > > - Mani > > -- > மணிவண்ணன் சதாசிவம்